5. WARNINGS RELATED TO DAILY MAINTENANCE
1. Memory backup battery replacement
When replacing the memory backup batteries, keep the
power to the machine (CNC) turned on, and apply an
emergency stop to the machine. Because this work is
performed with the power on and the cabinet open, only
those personnel who have received approved safety and
maintenance training may perform this work.
When replacing the batteries, be careful not to touch the
high–voltage circuits (marked
and fitted with an
Touching the uncovered high–voltage circuits presents
an extremely dangerous electric shock hazard.
The CNC uses batteries to preserve the contents of its
memory, because it must retain data such as programs,
offsets, and parameters even while external power is not
If the battery voltage drops, a low battery voltage alarm is
displayed on the machine operator’s panel or screen.
When a low battery voltage alarm is displayed, replace the
batteries within a week. Otherwise, the contents of the CNC’s
memory will be lost.
Refer to the maintenance section of the operator’s manual or
programming manual for details of the battery replacement